//VSCODE 格式化  SHIFT+ALT+F
let a = '张三';
let b = true;
let c = 100;
function sum(numa, numb, ...other) {
    return numa + numb;
}
sum(100, 200, 500, 600);
//类型推断 可以在生命变量的同时赋值，变量的类型自动的推断出来
let d = "李四";
export {};
